Bosch FAS-420-TM - M-Pipe System

46 en | Planning FAS-420-TM Aspirating Smoke Detector
F.01U.088.878 | 4.1 | 2010.11 Operation Guide Bosch Sicherheitssysteme GmbH
U-pipe system activation thresholds
Example:
If 3 of a total of 8 air sampling openings are found to be obstructed, airflow monitoring must
be set to ± 25% using the FAS-ASD-DIAG Diagnostic Software.
3.7.3 M-pipe system
U-pipe system Air sampling
opening
Number of air sampling openings
2468
Ø of air sampling
openings in mm
a
A 6.0 4.2 3.4 3.0
B-4.43.63.0
C--3.63.2
D ---3.2
a
Punch diameter of the aspiration reducing film sheet
U-pipe system Number of obstructed
air sampling openings
Number of air sampling openings
2468
Activation threshold
per pipe system
1 obstructed opening ± 25% ± 15% - -
2 obstructed openings 0 ± 25% ± 20% ± 15%
3 obstructed openings 0 0 ± 30% ± 25%
4 obstructed openings 0 0 0 ± 35%
5 obstructed openings0000
6 obstructed openings0000
7 obstructed openings0000
0 not practical
- not possible
NOTICE!
When planning in accordance with EN 54-20, airflow monitoring must always be set to 20%.
1 pipe system
FAS-420-TM
FAS-420-TM-R
FAS-420-TM-RVB
Figure 3.9 M-pipe system for space protection
A
B
FAS / FCS